9.3. SI Prefixes#
The table below contains SI prefixes ranging from \(10^{30}\) to \(10^{−30}\) that are currently recognized and used.
Prefix |
Symbol |
Meaning |
|---|---|---|
quetta- |
Q |
\(10^{30}\) |
ronna- |
R |
\(10^{27}\) |
yotta- |
Y |
\(10^{24}\) |
zetta- |
Z |
\(10^{21}\) |
exa- |
E |
\(10^{18}\) |
peta- |
P |
\(10^{15}\) |
tera- |
T |
\(10^{12}\) |
giga- |
G |
\(10^{9}\) |
mega- |
M |
\(10^{6}\) |
kilo- |
k |
\(10^{3}\) |
hecto- |
h |
\(10^{2}\) |
deka- |
da |
\(10^{1}\) |
deci- |
d |
\(10^{–1}\) |
centi- |
c |
\(10^{–2}\) |
milli- |
m |
\(10^{–3}\) |
micro- |
\(\mu\) |
\(10^{–6}\) |
nano- |
n |
\(10^{–9}\) |
pico- |
p |
\(10^{–12}\) |
femto- |
f |
\(10^{–15}\) |
atto- |
a |
\(10^{–18}\) |
zepto- |
z |
\(10^{–21}\) |
yocto- |
y |
\(10^{–24}\) |
ronto- |
r |
\(10^{-27}\) |
quecto- |
q |
\(10^{-30}\) |